package designprinciples.opencloseprinciple;

/**
 * @program: MyTank
 * @description:
 * @author: 王术平
 * @create: 2021-01-23 19:08
 **/
public class BaseUtil {
    public static boolean isEmpty(String str) {
        return str == null || str.length() == 0;
    }

}
